Meta class abstract interface

Interface for immutable metadata of network entities (users/groups).

Meta data contains core, unchanging information used to validate entities and generate their addresses/IDs. It implements Mapper for serialization to/from structured formats (Map/JSON).

Serialized format (Map/JSON):

{
  "type"        : "1",             // Algorithm version
  "key"         : "{public key}",  // Public key: PK = secp256k1(SK)
  "seed"        : "moKy",          // Entity name (seed for fingerprint)
  "fingerprint" : "..."            // Signature of seed: CT = sign(seed, SK)
}

Core algorithm:

  • Fingerprint = sign(seed, private key)
  • Used to verify the authenticity of the entity's name and public key
Implemented types
Available extensions

Properties

entries → Iterable<MapEntry<String, dynamic>>
no setterinherited
fingerprint → TransportableData?
Fingerprint to verify ID and public key
no setter
hashCode → int
The hash code for this object.
no setterinherited
isEmpty → bool
no setterinherited
isNotEmpty → bool
no setterinherited
isValid → bool
Validates the integrity of this metadata.
no setter
keys → Iterable<String>
no setterinherited
length → int
no setterinherited
publicKey → VerifyKey
Public key (used for signature)
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
seed → String?
Seed to generate fingerprint
no setter
type → String
Meta algorithm version
no setter
values → Iterable
no setterinherited

Methods

addAll(Map<String, dynamic> other) → void
inherited
addEntries(Iterable<MapEntry<String, dynamic>> newEntries) → void
inherited
clear() → void
inherited
containsKey(Object? key) → bool
inherited
containsValue(Object? value) → bool
inherited
copyMap([bool deepCopy = false]) → Map
Creates a copy of the internal map.
inherited
forEach(void action(String key, dynamic value)) → void
inherited
generateAddress(int? network) → Address
Generates an Address from this metadata for the specified network.
getBool(String key, [bool? defaultValue]) → bool?
inherited
getDateTime(String key, [DateTime? defaultValue]) → DateTime?
inherited
getDouble(String key, [double? defaultValue]) → double?
inherited
getInt(String key, [int? defaultValue]) → int?
inherited
getString(String key, [String? defaultValue]) → String?
Gets a string value for the given key.
inherited
matchIdentifier(ID identifier) → bool

Available on Meta, provided by the MetaVerifications extension

Check whether meta matches with entity ID (must call this when received a new meta from network)
matchPublicKey(VerifyKey pKey) → bool

Available on Meta, provided by the MetaVerifications extension

Check whether meta matches with public key
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
remove(Object? key) → dynamic
inherited
removeWhere(bool test(String key, dynamic value)) → void
inherited
setDateTime(String key, DateTime? time) → void
inherited
setMap(String key, Mapper? mapper) → void
inherited
setString(String key, Stringer? stringer) → void
inherited
toMap() → MutableMapping
Returns the internal map as a Map.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited
operator [](Object? key) → dynamic
inherited
operator []=(String key, dynamic value) → void
inherited

Static Methods

create(String type, VerifyKey pKey, {String? seed, TransportableData? fingerprint}) → Meta
Create from stored info
generate(String type, SignKey sKey, {String? seed}) → Meta
Generate with private key
getFactory(String type) → MetaFactory?
parse(Object? meta) → Meta?
setFactory(String type, MetaFactory factory) → void